diff --git a/snippets/formatDuration.md b/snippets/formatDuration.md
index 1be419892..ff983fff3 100644
--- a/snippets/formatDuration.md
+++ b/snippets/formatDuration.md
@@ -19,7 +19,7 @@ const formatDuration = ms => {
   };
   return Object.entries(time)
     .filter(val => val[1] !== 0)
-    .map(val => val[1] + ' ' + (val[1] !== 1 ? val[0] + 's' : val[0]))
+    .map(([key, val]) => `${val} ${key}${val !== 1 ? 's' : ''}`)
     .join(', ');
 };
 ```
diff --git a/test/formatDuration/formatDuration.js b/test/formatDuration/formatDuration.js
index 0da56ed15..79014859d 100644
--- a/test/formatDuration/formatDuration.js
+++ b/test/formatDuration/formatDuration.js
@@ -9,7 +9,7 @@ const formatDuration = ms => {
   };
   return Object.entries(time)
     .filter(val => val[1] !== 0)
-    .map(val => val[1] + ' ' + (val[1] !== 1 ? val[0] + 's' : val[0]))
+    .map(([key, val]) => `${val} ${key}${val !== 1 ? 's' : ''}`)
     .join(', ');
 };
 module.exports = formatDuration;